1. Dept. of Onco-Anesthesia and Palliative Medicine, Dr B.R.A. IRCH, All India Institute of Medical Sciences, New Delhi, India.
2. Delhi Cancer Registry, Dr B.R.A. IRCH, All India Institute of Medical Sciences, New Delhi, India.
3. Dept. of Psychiatry and NDDTC, All India Institute of Medical Sciences, New Delhi, India.
4. Dept. of Onco-Anesthesia and Palliative Medicine, NCI, Jhajjar, All India Institute of Medical Sciences, New Delhi, India.
5. Dept. of Pulmonary Critical Care and Sleep Medicine, All India Institute of Medical Sciences, New Delhi, India.
6. Stanford School of Medicine, Stanford, California, USA.
7. All India Institute of Medical Sciences, New Delhi, India.